Tongs turner for rolled material



Sept. 17, 1968 0. K. BUCHHEIT 3, 0

TONGS TURNER FOR ROLLED MATERIAL Filed Aug. 22, 1966 2 Sheets-Sheet 1Sept. 17, 1968 0. K. BUCHHEIT 3,401,805

TONGS TURNER FOR ROLLED MATERIAL Filed Aug. 22, 1966 2 Sheets-Sheet z Ww l...

Fig. 2

United States Patent Office Patented Sept. 17, 1968 3,401,805 TONGSTURNER FOR ROLLED MATERIAL Otto Karl Buchheit, St. Ingbert (Saar),Germany, assignor to Verwaitungsgeseilschaft Moeiler and Neumann offeneI-Iandelsgesellschaft, St. Ingbert (Saar), Germany Filed Aug. 22, 1966,Ser. No. 574,211 Claims priority, application Germany, Aug. 25, 1965,

2 Claims. (51. 214-4 ABSTRACT OF THE DISCLOSURE The invention relates tohydraulic turning apparatus of the tongs-type for handling rolledmaterial and includes turning rollers arranged on two swinging leversdisposed in a common vertical plane, the turning rollers being driveneach by a double contact pressure cylinder arranged in pendulum fashion.Prior art tongs turners of this type may be moved laterally relative tothe rolling path for such a distance that the roller table is completelyfree. The turner operates thus on a very wide guide and cannot beemployed in connection with tipping tables, as shown for example inGerman Patent 1,063,564. Other turning apparatus, so-called under-floortongs, turners, have a number of pivot joints so that the head of theturner may be retracted below the plane of the roller table.

It is an object of the present invention to provide bydraulicallyoperated turning apparatus of the under-floor tongs-type which is simplein construction and requires no devices whereby the pivot axis or axesof the pivot levers must be moved downwardly in order to free the rollertable during the rolling operation of the material to be treated. Thisis obtained according to the invention in that the two pivot levers aremounted on a common axis arranged below the plane of the roller table orpath, that the pressure pistons are mounted in different vertical planesand that the swinging pivot levers are actuated until they are locatedin the limit positions in which the turning rollers are located belowthe plane of the roller table. The swinging levers must thus be soformed that in spite of their common pivot shaft they may be movedrelative to each other into a position in which the two turning rollersare positively guided until they are located below the plane of theroller table. In this operation the two pivot levers merge in theiraxial projection because the particular pivot lever whose turning rollershaft is located farthest from the pivot shaft must describe or cover alarger angle in order to move its turning roller under the plane of theroller table. Accordingly, it is appropriately formed as a yoke with twobearing lug's which are located on both sides of the bearing of theother pivot lever.

In the drawing an embodiment of the tongs-type turner of the inventionis illustrated in which- FIGURE 1 is a vertical section along line II ofFIG- URE 2, and

FIGURE 2 is a side view showing a section through the swinging bearingarrangement of the hydraulic driving cylinder.

The turner according to the invention is mounted in a carriage 1 whichmay be moved over the travelling rollers 2 under the effect of apressure cylinder 3 in the guide rails 4 which are located between tworollers 5 of the roller table. The plane of the roller table isdesignated in FIGURE 1 by numeral 5a.

Below the plane 50 a pivot shaft 6 is mounted in carriage 1 and on thisshaft a yoke-like pivot lever 7 carrying a turning roller 8 on twobearing lugs 9 and a pivot lever 10 carrying the turning roller 11 aremounted. The hearing lugs 9 of the pivot lever 7 are located on bothsides of the bearing point of the pivot lever 10 which is bent sidewaysas shown in FIGURE 2 so that the two hydraulic cylinders 12 and -13 canbe disposed side-by-side in different vertical planes crossing pivotshaft 6. The pressure cylinder 12 engages with its piston rod 14 outsidethe vertical plane passing through the turning rollers at 15 on thepivot lever 7 While the pressure cylinder 13 with its piston rod 16engages at a pivot point 17 of the laterally bent pivot lever 10.

The two pressure cylinders 12 and -13 are mounted in pendulum fashion inthe carriage in the same vertical plane as the pivot shaft 6 inspherical bearings 18, 19 whereby a very compact construction of theturning apparatus is provided.

In the pivot position of the turning head shown in FIGURE 1 the roller11 terminates at the plane 5a of the roller table. The pivot lever 7whose turning roller shaft is at a greater distance from the commonpivot shaft 6, is formed as a yoke in order that it may be swung withoutinterference through the pivot lever 10 into the dot and dash position 7in which its turning roller comes to rest in the position '8' below therolling plane 5a. From FIGURE 1 it may be seen that the two pivot leversoverlie somewhat in their axial projection in this pivot position inwhich the roller table is free. Due to the increased pivot lift of thepivot lever 7 obtained in this manner an additional raising and loweringdevice for the tilting apparatus is not necessary.

The turner of the invention is particularly applicable for use inassociation with tipping tables for three-high frames and, as thecarriage 1 is movable laterally of the roller table, the turner can bemoved into the desired position for feeding the rolled material intoroll grooves of a selected size. During the operation of the turner, therolled material such as rods and the like is conveyed over rollers 5 ofthe roller table in a direction transverse to the axis of the rollers 5as viewed in FIGURE 2. In the illustrated operation of FIGURE 1, turningroller v11 has been moved into the solid line position with the uppersurface of the roller 11 in the same horizontal plane as the uppersurface of the rollers 5. The turning roller 8 has been swung down oreven swung back into the dotted line retracted position of FIGURE 1 topermit, as shown in the example of FIGURE 1, a rod of squarecross-sectional shape or profile to be moved over the rollers 5 onto theroller 11. The pivot lever 7 is then pivoted upwardly above the rollertable plane 5a by means of the cylinder 12 to clamp the rolled materialtherebetween. The clamped rolled material may then be turned by pivotingof the levers 7, 10 together, for instance, to the right as reviewed inFIGURE 1 to turn or rotate the rolled material through the selectedangle. The carriage 1 may also be moved transversely of the roller tablewith the rolled rod clamped between the rollers 8, 11 to the desiredposition in front of the selected groove in the three-high frame whilereversing the direction of movement of the roller table rollers 5 andwhile the tipping table changes its vertical position.

As can be understood, some rolled rods processed need not be turned. Insuch cases, the rollers 8, 11 are retracted below the roller table planea so that the rolled material may be moved transversely of the tablewithout turning by other means (not shown). As is well known, the anglethrough which the rolled material is turned is directly related to thedesired profile of the rolled material. For instance, the square profilematerial illustrated in FIGURE 1 would have to be turned by 90 forsubsequently introduction into tbox grooves in the rolls of thefollowing rolling frame, from the other side of which emerges the rolledmaterial with a rectangular profile. The rolled material is then turnedagain 90 and subse quently introduced into square grooves in the rollsof a rolling frame for the final pass. Where the sequence of passes issquare-oval, only a 45 turn is made between passes.

What is claimed is:

1. Tongs type turning apparatus for rolled material arranged to beassociated with a roller table having a plurality of rotatable rollerscomprising, in combination a carriage, means for moving said carriagetransversely of said roller table, a pivot shaft supported on saidcarriage below the horizontal plane defined by the upper surfaces ofsaid roller table rollers, a pair of pivot levers pivotally mounted onsaid pivot shaft, a turning roller on each of said pivot levers formovement by said pivot lever in a common vertical plan for clampingrolled material therebetween, a pair of fluid pressure actuatedcylinders pivotally mounted on said carriage below said pivot shaft invertically extending side-by-side relationship and means for operativelyconnecting each of said cylinders to an associated pivot lever forpivoting said pivot levers to move said turning rollers into clampingengagement with said rolled material and into a retracted position belowsaid roller table horizontal plane.

2. A turning apparatus in accordance with claim 1 wherein the turningroller on one of said pivot levers is positioned at a greater distancefrom said pivot shaft than the other turning roller, said one pivotlever formed as a yoke having spaced leg portions, bearing means on thefree ends of said yoke leg portions for rotatably mounting said onepivot lever on said pivot shaft and bearing means on said other pivotlever for pivotally mounting said other lever on said pivot shaftbetween said yoke bearing means.

References Cited FOREIGN PATENTS 9/ 1965 Germany. 12/1888 Great Britain.

